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ちょっと知的な雑学&トリビア

イルカでも「スモールワールド」

2005年10月29日 【雑学なメモ
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Quantifying the influence of sociality on population structure in bottlenose dolphins (Abstract)
http://www.nature.com/news/2005/051024/full/051024-10.html
David Lusseau, from the University of Aberdeen, UK, has spent years researching the social world of dolphins, to find out who knows whom and how often they meet. For the 130-strong community living off the east coast of Scotland, he found, it takes an average of just 3.9 steps to link any two dolphins by the shortest possible route through mutual friends.

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What do Einstein, Darwin and emails have in common? (October 2005) – News – PhysicsWeb
Albert Einstein and Charles Darwin replied to the many letters they received in their lifetimes in a way that is similar, statistically speaking, to the way that people reply to emails today.
http://www.nature.com/nature/journal/v437/n7063/abs/4371251a.html

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